[2353] in linux-scsi channel archive
Re: Problem recognising SCSI adapter.
daemon@ATHENA.MIT.EDU (Garry McNulty)
Wed Aug 27 03:49:18 1997
Date: Tue, 26 Aug 97 12:57 BST
From: gmcnulty@shannon.tellabs.com (Garry McNulty)
To: gmcnulty@shannon.tellabs.com, steffen@gfz-potsdam.de
Cc: linux-scsi@vger.rutgers.edu
> |> OK. I tried changing the ID of the CD Drive to 5 (it was 6). Now the SCSI
> |> adapter and CD-ROM are recognised by Linux.
> |> The IRQ is 5 and base address is 0xCA000.
> be it. make sure noone else is occupying irq 5, tho.
> |>
Hmm...my sound card *was* at IRQ 5. I noticed that even when both sound card
and SCSI adapter were at IRQ 5, they both worked fine under DOS. Seemed a bit
odd! However I have now changed my sound card to IRQ 10. I don't know of
anything using IRQ 5, but how can I find out for sure?
> |> TMC-8XX/TMC-950 options: ARBITRATE SLOW_HANDSHAKE FAST32
> maybe there are some options to fiddle with, see the BootPrompt.HOWTO
> |> scsi0 : TMC-8XX/TMC-950 at irq 5, address 0xCA000
> |> scsi : 1 host
> |> Vendor: TOSHIBA Model: CD-ROM XM-4101TA Rev: 0064
> |> Type: CR-ROM ANSI SCSI revision: 02
> |> Detected SCSI CD-ROM sr0 at scsi0, channel 0, id 5, lun 0
> |> Disc change detected
> |> VFS: Disk change detected on device 0b:00
> |> Disc change detected
> This is no error, this is only the confirmation of some line status being
> recognized. If you access the CD drive the first time, of course it's changing
> its state. Why it comes twice ? - ???
Sometimes I also get an error saying to 'check that a CD is in the drive' or
something like that.
I sometimes get different error messages each time I boot with the same setup.
The light on the CD drive does flash, indicating that the CD is being accessed.
> |> VFS: Disk change detected on device 0b:00
> |> scsi: aborting command due to timeout : pid 16, scsi0, channel 0, id 5, lun 0 Read (6) 00 00 10 01 00
> |> SCSI host 0 abort (pid 16) timed out - resetting
> |> SCSI bus is being reset for host 0 channel 0
> Termination problems ?
> Linux is known to be more sensitive to termination and cabling problems
> than DOS etc. , but it could have to do with the aforementioned options
> of the driver.
>
I checked the jumper on the CD drive. This is set to provide termination.
Is this enough?
The jumper for the adapter which should enable/disable termination is not
present. By that I mean there is no jumper present. There are two holes in
the PCB where a jumper could be placed. These holes are filled with solder.
As far as I can tell, that connection is NOT shorted (i.e. termination is
disabled). Should termination be enabled for the adapter as well as for
the CD drive?
I would be a little hesitant to go messing around with a soldering iron. If I
do solder that jumper (short the connection), will the device still work
under DOS?
Would there be a reason no jumpers were provided for that connection? Is that
connection not meant to be shorted?
Thanks for your help.
Garry
